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What is the use of a Dictionary class?

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Pragya Keshap answered on February 4, 2023 Popularity 1/10 Helpfulness 1/10

answer What is the use of a Dictionary class?

What is the use of a Dictionary class?

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The Dictionary class in Java is used to store key-value pairs. Any

non-null object can be used for key or value. But we cannot insert a

null key or null object in Dictionary.

Dictionary class is deprecated now. So it should not be used in

newer implementations

public class IterateKeyAndValuesExample  
{  
public static void main(String args[])  
{  
//creating a dictionary  
Dictionary dict = new Hashtable();  
//adding values in the dictionary  
dict.put(101, "Sydney");  
dict.put(102, "Brisbane");  
dict.put(103, "Melbourne");  
dict.put(104, "Perth");  
dict.put(105, "Lismore");  
dict.put(106, "Mount Gambier");  
dict.put(107, "Nelson Bay");  
dict.put(108, "Canberra");  
System.out.println("Dictionary values are: \n");  
//loop iterate over the values stored in the dictionary  
for(Enumeration enm = dict.elements(); enm.hasMoreElements();)  
{  
//prints the value      
System.out.println(enm.nextElement());  
}  
System.out.println("\nDictionary keys are: \n");  
//loop iterate over the keys stored in the dictionary  
for(Enumeration enm = dict.keys(); enm.hasMoreElements();)  
{  
//prints the keys      
System.out.println(enm.nextElement());  
}  
}  
}

https://www.javatpoint.com/dictionary-class-in-java

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: dictionary java

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

What is the use of a Dictionary class?

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